The memberUpdateTimestamp tag is used by the getMemberList service to identify when a change was last made to a member's personal information.
NOTE: The memberUpdateTimestamp tag may change even if none of the values listed below are changed. This is due to the fact that the member's information is updated in its entirety when demographic or personal information is changed in DataTrak or other ABC applications. The change may have been made to a value that is not returned by this web service (such as the member's employer).
When any of the following values are changed, the memberUpdateTimestamp will be updated to the time of the change: